吸使气体皮质D失活,并阻断热
Fiachra Humphries1, Liraz Shmuel-Galia1, Natalia Ketelut-Carneiro1
1Program in Innate Immunity, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA.
概括
双甲基烟酸 (DMF) 通过修改气体皮质D (GSDMD) 来阻止细胞死亡. 这一发现为多发性硬化症等炎症性疾病提供了新的治疗策略.
科学领域:
- 免疫学
- 细胞代谢
- 分子生物学
背景情况:
- 激活的巨细胞表现出对有氧糖解的代谢转变,通过克雷布斯循环中间体影响免疫基因表达.
- 炎症性编程细胞死亡 (Pyroptosis) 与各种炎症性疾病有关.
研究的目的:
- 为了研究烟酸在热细胞死亡中的作用.
- 为了确定 fumarate 在调节 pyroptosis 的分子点.
- 探索基于烟酸的化合物在炎症疾病中的治疗潜力.
主要方法:
- 细胞测试以评估热死抑制.
- 生物化学分析以确定蛋白质的修饰.
- 在炎症疾病的小鼠模型中的体内研究.
主要成果:
- 包括二甲基 fumarate (DMF) 在内的 fumarate 已被确定为 pyroptosis 的抑制剂.
- 酸盐与氨酸残留物直接发生反应,形成S- ((2-succinyl) - 氨酸添加物.
- GSDMD的吸附抑制了它的激活,处理和孔隙形成,从而防止了热.
- 在家族地中海热和实验性自身免疫脑炎模型中,DMF的使用保护了小鼠免受脂多糖诱导的休克,并改善了症状.
结论:
- 气体D (GSDMD) 是酸盐的直接分子标.
- 通过酸盐介导的 GSDMD 化是一种抑制热的新机制.
- 通过向GSDMD,Dimethyl fumarate (DMF) 显示出对包括多发性硬化症在内的炎症状况的治疗潜力.
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